读取excel为 javabean

src/com/platform/utils/excelUtils/ExcelOperation.java

@@ -3,6 +3,7 @@ package com.platform.utils.excelUtils;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.lang.reflect.Field;
+import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
 
@@ -25,26 +26,23 @@ import com.base.Constant;
  */
 public class ExcelOperation {
 	
-	/** 读取excel模板
+	/** 写入excel
 	 * @param templateFilePath
 	 * @param list list中对象的属性顺序和模板的列顺序一一对应
+	 * @param excelInitRow //从第excelInitRow行 开始填充数据，( Constant.EXCEL_TEMPLATE_INIT_ROW)
 	 * @return HSSFWorkbook
 	 * @throws FileNotFoundException
 	 * @throws IOException
-	 * @throws IllegalAccessException 
 	 * @throws IllegalArgumentException
-	 */
+	 * @throws IllegalAccessException
-	public static XSSFWorkbook writeExcelTemplate(String templateFilePath, List list) throws FileNotFoundException, IOException, IllegalArgumentException, IllegalAccessException {
+	 *///从第几行 填充数据
+	public static XSSFWorkbook writeExcelTemplate(String templateFilePath,int excelInitRow, List list) throws FileNotFoundException, IOException, IllegalArgumentException, IllegalAccessException {
 //		InputStreamReader in= new InputStreamReader(Resource.class.getResourceAsStream(templateFilePath), "UTF-8");
 		ClassPathResource res = new ClassPathResource(templateFilePath);
 		//此处 耗时太久：（原因：excel 2007 以后采用的方式不同造成的建议升级 到 poi 3.15以上）
-		Date date = new Date();
 		XSSFWorkbook workbook = new XSSFWorkbook(res.getInputStream());
-		Date date2 = new Date();
+//		System.out.println(" new XSSFWorkbook： "+ (date2.getTime()-date.getTime()));
-		System.out.println(" new XSSFWorkbook： "+ (date2.getTime()-date.getTime()));
 		
-		//从第几行 填充数据
-		int excelInitRow = Constant.EXCEL_TEMPLATE_INIT_ROW;
 		 //读取工作表
 		XSSFSheet sheet = workbook.getSheetAt(0);//getSheet("Sheet1");
 	    XSSFRow row;
@@ -61,9 +59,15 @@ public class ExcelOperation {
 				fields[j].setAccessible(true);
 				cell = row.createCell((short) j,HSSFCellStyle.ALIGN_CENTER);
 			    cell.setCellType(HSSFCell.CELL_TYPE_STRING);
-			     Object value = fields[j].get(obj);
+			    Object value = fields[j].get(obj);
 			    if (null != value) {
-			    	cell.setCellValue(value.toString());
+			    	//int型
+			    	if (fields[j].getType().toString().contains("Integer")) {
+			    		cell.setCellValue(String.valueOf(value));
+					}
+			    	else {
+			    		cell.setCellValue(value.toString());
+					}
 				}
 			    else {
 			    	cell.setCellValue("");
@@ -85,6 +89,10 @@ public class ExcelOperation {
 		return workbook; 
 	}
 
+	/** excel的cell样式设置
+	 * @param workbook
+	 * @return
+	 */
 	private static XSSFCellStyle getStyle(XSSFWorkbook workbook) {
 //	     设置字体;
 		  XSSFFont font = workbook.createFont();
@@ -123,4 +131,63 @@ public class ExcelOperation {
 		  return style;
 	}
 	
+	/** 读取excel模板
+	 * @param workbook excel的XSSFWorkbook
+	 * @param excelInitRow 读取数据的起始行
+	 * @param classz excel的每行数据导出 到的 类
+	 * @return
+	 * @throws IllegalAccessException 
+	 * @throws InstantiationException 
+	 */
+	public static List readExcelTemplate(XSSFWorkbook workbook, int excelInitRow, Class<?> classz) throws InstantiationException, IllegalAccessException {
+		List list = null;
+		 //读取工作表
+		XSSFSheet sheet = workbook.getSheetAt(0);//getSheet("Sheet1");
+	    XSSFRow row;
+		XSSFCell cell = null;
+		//excel总行数
+		int rowNum = sheet.getLastRowNum();
+        row = sheet.getRow(0);
+        //excel总列数
+        int colNum = row.getPhysicalNumberOfCells();
+        // 填充数据的类的 属性个数
+        int objColl = classz.getDeclaredFields().length;
+        //如果有数据
+        if (rowNum > excelInitRow) {
+			list =  new ArrayList<>();
+			//遍历每行数据
+	        for (int i = excelInitRow; i < rowNum; i++) {
+	        	//获得当前行
+	        	row = sheet.getRow(i);
+	        	//实例化
+	        	Object newObj = classz.newInstance();
+	        	Field[] fields = newObj.getClass().getDeclaredFields();
+	        	boolean isAddObj = false;
+	        	//遍历每列的数据
+	        	for (int j = 0; j < objColl; j++) {
+	        		cell = row.getCell(j);
+	        		if (null != cell) {
+		        		fields[j].setAccessible(true);
+		        		String cellString = cell.getStringCellValue();
+		        		if (!"".equals(cellString)) {
+		        			isAddObj = true;
+			        		//int型
+					    	if (fields[j].getType().toString().contains("Integer")) {
+					    		fields[j].set(newObj, Integer.valueOf(cellString));
+							}
+					    	else {
+					    		fields[j].set(newObj, cellString);
+							}
+		        		}
+		        		
+	        		}
+				}
+	        	if (isAddObj) {
+	        		list.add(newObj);
+				}
+			}
+        }
+		return list;
+	}
+
 }